copper

This looks like a very simplified bloom filter made with a very bad hash function. Mind you, though, I am pretty sure I'd never rediscover that particular data structure by myself :)

0 o'clock could be interpreted as 12 o'clock too.

Thank you!

It apparently treats '+' as invalid in an email, too.

"this is not quantum theory, after all..." is one of the funnier comments I've seen on a review. Judging by the rest of it, I'm tempted to guess that it was written by someone from team-PLT :)

Could either you or David put the source for the LL(k) version up somewhere? Comparing it head-to-head with parsec (or its faster cousins) something fun to do.

Facebook apparently has 1700+ employees, though: does that mean those who joined at the 500+ mark were either not granted options, or are not exercising them? That seems strange to me. Assuming I was given options in a fast-growing company, I'd want to buy them as and when they vested, to have some protection against dilution :)

> By creating derivatives of the stock, the investment firms are helping Facebook keep its shareholder count at 499 or less, the maximum number a company can have before it has to disclose results to the public.

Out of curiosity, what does this imply for stock options? Are people who exercise them included in this count?

A better way of stating this would be to look at how much information you can extract from the library with one book in a given time, as compared to the library that contains "all" books: nearly all such books would have gibberish in them.

Eliezer's statement would be a lot less surprising with a proper definition of "all" :)

> Facebook could integrate with every other service and app under the sun, and users would not require to input information (any more then their Facebook uri) to register for anything.

Facebook has done exactly this, and there's been quite a bit of backlash, with some discussion on this site itself.

I think I understand that, but without actually writing it out, it's going to be impossible to test.

The types I was talking about go as: type Context a b = (Adj b, Node, a, Adj b) type Adj b = [(b, Node)]

It definitely allows traversal, and adding nodes seems to be possible, too (judging from the api, of course, it ought to be :)

Agreed. RBI's large response time is a good thing: it was one of the factors that allowed some insulation from the '08 crisis. It's not so much fun when it comes to deposit rates though :)

Wouldn't the Data.Graph.Inductive representation of a graph satisfy this (It might not be O(1), but it's pretty close)? I must admit that I find it hard to see what a zipper for a graph should look like, though.

The IMF predictions are pretty amusing[1] too, if you like that kind of thing.

[1]: http://www.tradingeconomics.com/india/inflation-average-imf-...

His numbers are a bit on the high side (I'd probably spend that much for a meal in the food courts at some SEZ), but the basic point is valid: I believe we still see a >10% inflation rate here. For basic food commodities, the rate may be even higher.

Not too much (and that's particularly true if you look at the older engineering disciplines.) The goal of an undergraduate education would be to learn how to learn.

In general, you wouldn't know what a new discovery would contribute to technological advancement or productivity increases :) If you did, it's arguably because the research you're doing is an incremental improvement over something already existing, rather than something entirely new (not that there's anything bad with doing either of those things.)

Putting these kinds of things on the back burner may be a good thing only if you're sure that the money being spent on it will be used for something more necessary/efficient/whatever.

Sorry :) It's fixed now, though. Thank you!

Just so you know, clicking on Signout gives me this:

Message: MySQL Query fail: SELECT * FROM follow WHERE user_id = MySQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 Date: Wednesday, October 6, 2010 at 8:53:41 AM Script: /index.php Referer: http://hackerfollow.com/

Great idea, though!

eprintweb: http://eprintweb.org/S/rss/cs in google reader. There are a few of the math/ and q-bio/q-fin feeds that are usually interesting reading.

I'm not sure why I didn't use the arXiv RSS feeds directly.

> a Facebook app running on a Webkit core that opens all external links in Firefox.

This sounds really nice, but doesn't facebook also do the sa=D-style redirects like google? (I've no way to check.) If so, it effectively becomes a nice cross-browser way of tracking you.

(For example: http://www.google.com/url?sa=D&q=http://haskell.org/hask... )

I believe the new flash player versions do respect the private browsing modes of browsers.

Back when I used to use windows, I used to touch two files called "#Security" and "#SharedObjects" in the flash player app data folder, which prevented it from downloading anything at all. In retrospect, it was an overly heavy-handed way of doing things :)

Well, there's not much to say, really: I finished college, joined a dull-ish corporate job (that nonetheless taught me more than I wanted about politics, including the fact that I suck at it), and then joined a startup.

This is the kind of startup that doesn't figure all that much on HN, since it's in a rather specialized niche of a specialized industry to begin with. I'm not a founder, but one of the early employees.

I did - and this is in India, where "high" isn't really all that high to begin with.

My thought process was pretty simple: at the time, I was more or less independent, and living /very/ frugally, which made the decision easy. I do know this: if my financial needs were different, I wouldn't have moved.

And of course, it's usually the case that the people who say "all the right things" are usually the ones who tend to do what advances their own career at the expense of the team :)

Hm, where's vgr when you need him :) His Office posts tend to nail this particular point of the story nicely.

Oh, his point is perfectly clear - I particularly like the example that follows. It's just the choice of words is so unfortunate as to obscure the rest of the message.

For what it's worth, though, he underestimates the harm that a politically naive junior employee might be capable of wreaking - by simply being ignorant of political undercurrents that might exist.

> Similarly, if you manage a junior employee and they ask you about their career development, you can say what comes naturally and generally get away with it.

Somehow, the wording of that statement makes me reluctant to work for the author as a junior employee.

Fair enough - though see his point about the green card process. It's pretty painful to have that process reset on you, and to actually find an employer if you do lose a job.

What he meant, I rather suspect, is not so much as 'ethically repugnant' (in which case I might agree with you) but rather within the gray area, where unvoiced pressures such as these can affect the choices you make.

Sure, if you can represent your problem using probabilities :)

That said, I'm more excited about the use of Lyric's technology in ECC memory. I'm skimming through Vigoda's thesis, and it seems that another very interesting application ought to be making even lower-power mobile backend chips.

LinkedIn, are you listening? :)

They already do the first two steps, and going from there to (c) may already be possible with their profile API. From that onto the last two steps is a short step.